A method with three-dimensional (3D) position measuring using a radio detection and ranging (radar) sensor includes: transmitting, through the radar sensor, a transmission signal of which a carrier frequency varies over time; obtaining, through the radar sensor, a reflected signal from the transmission signal being reflected by an object; obtaining a beat frequency signal indicating a frequency difference between the transmission signal and the reflected signal; and estimating 3D position information of the object based on groups of sample data of different frequency bands extracted from the beat frequency signal.
Legal claims defining the scope of protection, as filed with the USPTO.
5. The method of claim 3, wherein the time-frequency analysis method is a short-time Fourier transform (STFT) or a wavelet transform (WT).
6. The method of claim 1, wherein the transmitting antennas are arranged in a horizontal direction in the radar sensor.
7. The method of claim 1, wherein the 3D position information comprises a distance, the azimuth, and the elevation angle with respect to the position of the object.
9. The method of claim 1, wherein the carrier frequency is modulated based on a frequency modulation model that uses linear frequency modulation.
10. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method of claim 1.
14. The apparatus of claim 13, wherein the time-frequency analysis method is a short-time Fourier transform (STFT) or a wavelet transform (WT).
17. The apparatus of claim 16, wherein the 3D position information includes a distance and an elevation of a position of the object relative to a position of the apparatus.
18. The apparatus of claim 16, wherein the processor is further configured to estimate the 3D position information by estimating a distance and an elevation angle with respect to a position of the object by applying a time-frequency analysis method to the groups of sample data of the different frequency bands.
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April 20, 2020
May 30, 2023
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